Replace corrosion with a temporary effect.

If your equipment would have been corroded under the old system, you now
get a temporary (but stacking) -5 AC and -3 weapon damage.  Corrosion
against armour-wearing monsters instead halves their AC.

Committer's notes:

    Fixed whitespace and fit to Trunk

    Added Corrosion entry to hiscores.cc

    The original patch showed the slaying malus on the weapon, which may
    be preferable to a status light.

    gammafunk noted that ouch.cc iterates over equipment when deciding
    when to corrode, this might make less sense under the new system.

-reaverb

1 files changed, 3 insertions, 0 deletions

diff --git a/crawl-ref/source/attack.cc b/crawl-ref/source/attack.cc
index 01ee0c7b8f..2f54ecddc4 100644
--- a/crawl-ref/source/attack.cc
+++ b/crawl-ref/source/attack.cc
@@ -1344,6 +1344,9 @@ int attack::player_apply_slaying_bonuses(int damage, bool aux)
 
         if (weapon->base_type == OBJ_RODS)
             damage_plus = weapon->special;
+
+        if (you.duration[DUR_CORROSION])
+            damage_plus -= 3 * you.props["corrosion_amount"].get_int();
     }
     damage_plus += slaying_bonus(PWPN_DAMAGE,
                                  !weapon && wpn_skill == SK_THROWING